锦州湾沉积物特征与物质来源的探讨     

符文侠  鲍永恩  何宝林 《海洋科学进展》1994,(2)

本文依据现场调查的粒度、重矿物和粘土矿物进行分析并结合河、海悬沙分析资料，阐述了锦州湾沉积物类型和特征；重矿物和粘土矿物的分布以及组合特征，并着重分析和讨论了锦州湾的物质来源。  相似文献   

钱塘江河口段通航能力的初步分析   总被引：1，自引：0，他引：1  

符宁平  余祈文 《海洋学研究》1993,11(3):10-16

本文阐述了钱塘江通海航道的现状,指出仓前至尖山的中段航道影响着河口出海通航能力,四工段浅滩是主要的碍航浅滩。文中还对不同水文条件下,钱塘江河口段的乘潮保证率和最大可能出海运量作了分析,在此基础上提出了改善航道条件的措施。  相似文献   

Bispectrum and asymmetry of wave shape     

Ding Pingxing  Kong Yazhen  Sun Fu 《海洋学报(英文版)》1996,15(3):297-305

Ｂｉｓｐｅｃｔｒｕｍａｎｄａｓｙｍｍｅｔｒｙｏｆｗａｖｅｓｈａｐｅ￥ＤｉｎｇＰｉｎｇｘｉｎｇ；ＫｏｎｇＹａｚｈｅｎ；ａｎｄＳｕｎＦｕ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙＯｆＥｓｔｕａｒｉｎｅａｎｄ￣ａｌＲ￣ｈ，ＩｎｓｔｉｔｕｔｅｏｆＥＳｔｕａｒｉｎ...  相似文献   

海藻多糖微量元素配合物的生物活性初步研究     

傅德贤  赵迪  郭澄联 《热带海洋学报》1995,(1)

用广东沿海盛产的半叶马尾藻Ｓａｒｇａｓｓｕｍｈｅｍｉｐｈｙｌｌｕｍ为原料提取多糖，与Ｆｅ（３＋），Ｚｎ（２＋）等微量元素进行反应，形成能溶于水的海藻多糖配合物。分别以剂量为３００ｍｇ·ｋｇ（－１）的海藻多糖配合物饲喂ＮＩＨ系小鼠７－１５ｄ。结果发现，该多糖配合物能提高小鼠的血红蛋白和红细胞数量。其中，以Ｆｅ（３＋）海藻多糖配合物效果最显著。观察各种免疫指标，发现海藻多糖和海藻多糖微量元素配合物都能提高小鼠的免疫指标。海藻多糖微量元素配合物的效果比海藻多糖好。结果提示，微量元素参与了机体的免疫活动，并提高了免疫活性。  相似文献   

西太平洋暖池形成与维持的动力学机制     

傅刚  周发琇  朱抱真 《中国海洋大学学报(自然科学版)》1993,(Z2)

建立了一个简单海气耦合模式,其中大气垂直分为两层,为-β平面近似线性模式。在非绝热加热项中包含了对流凝结潜热与大尺度流场之间相互作用的CISK机制以及蒸发、感热与扰动风场之间的反馈机制,并考虑了平均东风区和西风区的不同。由于只研究大气的平均纬向运动,故模式大气中仅含有Kelvin波。海洋模式为一约化重力模式,在一定条件下采用准地转近似,模式海洋中仅保留了Rossby波。对这一海气耦合模式进行特征波动分析,发现海气耦合并不显著改变大气波动的性质。在中东太平洋的平均东风区,大气的Kelvin波仍然增幅和东传。在平均西风区,大气Kelvin波振幅衰减。但耦合作用却使海洋Rossby波的性质发生变化,且波长超过某一临界波长Le的Rossby波的振幅增长。在平均东风区,结论相论。这一理论说明西太平洋暖池的形成与海洋Rossby波有关。在东太平洋,由于是平均东风区,短的Ross-by波振幅增长,不能形成水平尺度很大的“暖池”。而在平均西风的西太平洋区,有可能形成水平尺度很大的“暖池”。  相似文献   

Maximum entropy principle and statistical distribution of ocean wave heights     

Wu Kejian  Sun Fu 《海洋学报(英文版)》1996,15(1):59-67

Ｍａｘｉｍｕｍｅｎｔｒｏｐｙｐｒｉｎｃｉｐｌｅａｎｄｓｔａｔｉｓｔｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｏｃｅａｎｗａｖｅｈｅｉｇｈｔｓ￥ＷｕＫｅｊｉａｎａｎｄＳｕｎＦｕ（ＲｅｃｅｉｖｅｄＭａｙ１５，１９９５；ａｃｃｅｐｔｅｄＪｕｎｅ２１，１９９５）Ａ...  相似文献   

Barite chimneys on the Gulf of Mexico slope: Initial report on their petrography and geochemistry     

Baoshun Fu  Paul Aharon  G. R. Byerly  H. H. Roberts 《Geo-Marine Letters》1994,14(2-3):81-87

Barite chimneys associated with hydrocarbonrich fluid venting were recently documented and sampled on the Gulf of Mexico slope offshore Louisiana at 510–520 m water depth. The chimneys are dominated by barite associated with minor amounts of pyrite, iron oxide, Mg calcite, and detrital silicates. The barite displays distinct string-like and dendritic-like morphologies assembled from rosette-shaped crystals that are typically 20–40 µm in diameter. The chimneys exhibit macroscopic growth layers 1–5 mm thick, which alternate between dark gray and light yellow colors. The dark layers are dominated by string barites associated with disseminated pyrite, while the light layers are dominated by dendritic barites with little or no pyrite. The barites are anomalously enriched in Sr (average 15.5 mol% and maximum 30 mol%) and Ca (average 2.8 mol% and maximum 4.6 mol%), and exhibit rhythmic, paired, microscopic light and dark bands. The exact origin of the barites and their mode of deposition has not yet been elucidated, but they are likely to be related to the hydrocarbon-rich fluids venting on the seabed.  相似文献   

Fibrous adsorbent containing amidoxime and carboxyl groups and adsorption of uranium     

Fu Wentong  Luo Bingkun  Chen Huizhen  Zhuang Wanjin  Liu Shiyu  Chen Lianzhi 《海洋学报(英文版)》1988,7(1):74-81

Through introducing amidoxime and carboxyl groups into polyacrylonitrile fiber, a fibrous adsorbent with high capacity and fast adsorption rate was obtained, which could adsorb 4.6 mg uranium/g in 10 days from natural seawater. The influence of the functional group content on equilibrium adsorption capacity Xm and adsorption rate constant K of the adsorbent was studied, thus indicating that the contents of amidoxime and carboxyl groups correlated with Xm and K respectively. It is concluded that the amidoxime group is of reactive adsorption, while the carboxyl group is of promotion in the adsorption of uranium. In this paper, the mechanism of uranium adsorption on the fibrous adsorbent is deduced and the chelating structure of adsorption species is discussed with molecule orbit theory.  相似文献   

辽宁海岸带沉积物的化学特征及其相互关系的研究     

符文侠  周永芝  李光天 《海洋科学进展》1993,(2)

本文利用辽宁海岸带沉积物的1856个化学样品的分析资料,探讨了该区沉积物的化学要素含量与分布特征,并着重分析了各化学要素间的相互关系及其与沉积环境的关系等。  相似文献   

Gas chromatographic determination of lignin in sediment   总被引：1，自引：0，他引：1  

Fu Tianbao  Chen Song  Jiang Shanchun 《海洋学报(英文版)》1993,12(3):417-423

After the oxidation of river and marine sediments with CuO under alkaline conditions, the phenolic compounds in the oxidation products are determined gas chromatographically and compared to that of lignin oxidation products. The method of CuO oxidation is compared to that of nitrobenzen. The quantitative determination of produced phenolic compounds by capillary gas chromatography is examined and the blank and repetibility of the method are tested.  相似文献